الفهرس 
Introduction & aim of the workOnly 14 pages are availabe for public view
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Abstract
This study was carried out in EI-Minia University hospital in the period from January to July 2011 on sixty patients ASA physical status I or II, aged 18-60 years and undergoing elective lower extraperitoneal abdominal and lower limb surgery under spinal anesthesia, with expected surgical times not less than forty five minutes. Those patients were randomly divided into three groups each included 20 patients with a double blinded design;
Group I received magnesium sulfate 50 mglkg LV. Bolus + 2mglkglhour infusion as a prophylaxis.
- Group II received magnesium sulfate 50 mglkg LV. bolus as a therapy when shivering occurred, and if shivering persisted, they received 25 mglkg LV. bolus.
Group III received sterile water for injection as a placebo. In all groups if shivering persisted, Meperidine (Pethidine) 25 mg LV. was given as a rescue drug.
We aimed in this study to compare the prophylactic versus therapeutic administration of magnesium sulfate for controlling of shivering that occurs during spinal anesthesia and determine which of them control shivering with less complication and less adjuvant drug use.
All patients received lactated Ringer’s solution preoperatively and a standard technique was employed for spinal anesthesia in all groups and the drugs were administered after receiving spinal anesthesia.
Onset of sensory block (by pin prick), and motor block (by bromage scale) were evaluated.